# Problem with Brute Force

• March 14th, 2010, 09:52 AM
mortis1572
Problem with Brute Force
Hi my name is George.
I want to make a program generate all the possible characters of length 8 using all the characters in charSet
char[] charSet = {0,1,2,3,4,5,6,7,8,9}.
I made that program to understand the algorithm , then I want to make the same with 8 char length.
I have a zip file with AES encryption and I want to find out the password with brute force and dictionary attack.
I have made it with dictionary attack but with brute force I have a problem.
I understand that is useless but I must done it.

Code :

```import java.io.*; class Brutus { public static void main(String args[]) { char charSet[] = {'0','1','2','3','4','5','6','7','8','9','a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j','k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't','u', 'v', 'w', 'x', 'y', 'z'}; String x = "zzzz"; for (int i = 0; i < charSet.length; i++) { for (int j = 0; j < charSet.length; j++) { for (int k = 0; k < charSet.length; k++) { for (int l = 0; l < charSet.length; l++) { String s = charSet[i] + "" + charSet[j]+ "" + charSet[k]+ "" + charSet[l]; System.out.println(s); if (x.equals(s)){ System.out.println("the paswd found"); }else{ System.out.println("the pswd isn't found"); } } }     } }```
But as you see thai is onle 4 characters and I want 8.
I believe that there is another way to make without to make 8 for.
If anyone have an idea help me.